Would like more amps...

I would like to run more electrical stuff on the car and was wondering how more amps works? Likely I have a 60 amp alternator now with the traditional voltage regulator. I was thinking 80 amps or even a hundred on a one wire. if I wanted to do a hundred amps would I just put a one wire alternator on and run that wire to the positive of the battery.. no problemo?..
I think right now I have one fat wire coming from the positive of the battery to my control switches which run the six Al and all of my accessories. I believe I have a wire that comes off the starter the comes in and runs the Factory fuse box and runs the headlights taillights blinkers and Horn and actually the starter relay..
Thank you for anybody and everybody's help and experience..
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I am far from an expert, but a msd , no ballast resister , and a one wire 100 to 130 amp would be a vast improvement , handle anything , but would need some wiring updates, like getting rid of the firewall connections to start with.
see above post^^^^^^^^^^^^I run a 130 amp gm alternator on mine , will handle anything.